Just a general thought. Don't get in the habit of shot gunning parts. It will lead you to pain, misery, and a depleted bank account. Prove the part is bad before you change it. I'll agree there's times when the smoking gun isn't there but, there's always steps you can take to lead you in the right direction.
It very well may be the pump but, 150K miles is no reason to change a fuel pump. There's plenty of Chrysler Minivans out there with 200K+ miles on them with original pumps. jdl is leading you on the right track. If the pump is bad, slantsixiness has saved you some headaches for sure. Remember; spark, fuel, timing. If one is missing you'll go nowhere. Cheers! Spread the word - let us know what you find.